How do you replace spark plugs on Chevy Avalanche 1500?

To replace the spark plugs on a Chevy Avalanche 1500, first, ensure the engine is cool and disconnect the negative battery terminal. Remove the ignition coil or spark plug wires, then use a spark plug socket and ratchet to carefully unscrew the old spark plugs. Install the new spark plugs by hand to avoid cross-threading, then tighten them to the manufacturer's specified torque. Finally, reattach the ignition coils or spark plug wires and reconnect the battery.